Dispensing apparatus and cartridge therefor



1952 w. P. PETERSON DISPENSING APPARATUS AND CARTRIDGE THEREFOR Filed March 20, 1948 ISnventor Wilbur F W 16 Patented Jan. 8, 1952 DISPENSING APPARATUS AND CARTRIDGE THEREFOR Wilbur P. Peterson, Independence, Mo. Application March 20, 1948, Serial No. 15,982

1 Claim.

. This invention relates to caulking guns, and particularly to guns for dispensing the caulking material from a cartridge through a nozzle of the gun.

Heretofore, in devices of this character, it has been extremely difficult, if not impossible, to prevent leakage of the caulking material around the nozzle of the gun. With present-day guns they usually include abarrel and the cartridge is inserted in the barrel by removing one end of the barrel either at the handle of the gun or the spout end, and the cartridges inserted in the end of the barrel. Applicants device includes a magazine semi-circular in cross-section providing a trough-like magazine adapted to receive the cartridge in which the plastic or other material is contained, the cartridge being placed in the magazine without dismantling of the gun. The material is expelled from the cartridge by a plunger including a rod which is moved forwardly in the magazine by mechanism contained in the handle of the gun and the plunger held in extended position until it is desired to withdraw the plunger for removal of the cartridge when it has been emptied.

The principal objects of the present invention are to provide a head on the magazine for the prevention of loss of caulking material around the nozzle and head during operation of the gun; to provide a semi-circular magazine and handle for the gun so that the cartridge may be inserted in the magazine and removed therefrom without taking down of the gun; to provide a magazine semi-circular in cross-section having a cap on its rear end and a head on its forward end, the upper side of the magazine being open for the reception of the cartridge; and to provide a device of this character, simple, economical to manufacture and efficient in operation.

In accomplishing these and other objects of the present invention, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is a perspective view of my gun without the cartridge in the magazine.

Fig. 2 is a longitudinal central section through the gun showing the cartridge as it is being inserted in the magazine.

Fig. 3 is a longitudinal central section through a part of the magazine of the gun showing seal of cartridge.

Fig. 4 is a cross-sectional view of the forward end of the gun with the cartridge removed therefrom.

Referring more in detail to the drawings:

i designates a gun embodying the features of my invention, comprising a magazine 2, a cap 3, rigidly secured to its rear end, and a head 4, secured to its forward end as illustrated in Figs. 1 and 2. The cap 3 and head'd are substantially circular and have oppositely facing flanges 5 and 6, the magazine 2 engaging in the flanges and rigidly secured thereto by welding or other suitable means, thus forming a trough-like structure for receiving a cartridge 1 containing a plastic or like material 8 therein to be dispensed from the gun through the nozzle 9 of the head 4. The magazine 2 is substantially semi-circular, and the upper half open so that the cartridge 1 may be inserted in the magazine without removal of the head or cap therefrom.

The head 4 has a disk-like member ID having a central opening II formed by punching of the disk I 9 and having an outwardly extending flange I2 for receiving the spout 9, the spout 9 extending inwardly from the disk a short distance as best illustrated in Fig. 3. The spout 9 is fitted into the opening to make an air-tight seal. The head In is offset laterally from the flange 6 and then turned inwardly at an angle as indicated at I3, then downwardly as indicated at I4, inwardly at an angle as indicated at I 5, then laterally downwardly at I B, then outwardly to form the flanges I2 around the opening for the spout 9. The disk of the head is thus provided with spaced annuli as indicated at I1 and I8 (Fig. 4).

Rigidly secured to the rear face of the cap 3 by welding or other suitable means is a frame I9 having a handle or hand grip 29 comprising a single sheet of metal doubled on itself to provide a'rounded back portion 2 I, two parallel side portions 22 and 23. The forward end of the frame is flared outwardly forming flanges 24 and 25 on each of the side pieces for fastening the frame to the cap 3. The forward portion of the hand grip 2a is open and pivotably mounted therein by a bolt or the like 26, is a lever 21. The lower end of the handle 20 is provided with inturned flanges or lugs 28 to provide a stop for the lever 21. The underneath portion of the frame I9 is open and provided with lugs 29 to form an abutment against which a lug 39 on the forward portion of the lever is adapted to engage and thus provide a stop for forward movement of the lever 21.

The cap 3 is centrally bored as indicated at 3 I, Fig. 2, and the rear portion of the frame I9 is also provided with an opening 32. Extending through the openings 3| and 32 and adapted to slide therein is a plnger rod 33. Rigidly secured on the forward end of the plunger rod is a disk 34. Thedisk is here illustrated as having a central threaded opening 35 adapted to receive the threaded end 36 of the plunger rod 33. The disk is slightly smaller in diameter than the flanges 5 of the cap 3 and also slightly smaller than the cartridge 1. The plunger rod 33 extends outwardly through the opening 32 of the frame and is turned laterally to provide a. handle or finger portion 31 on the rod. Surrounding the plunger rod 33 within the hand grip is a plurality of feeding plates 38 of substantially rectangular shape, two of such plates here being shown. Between plates 38 and the back wall of the hand grip are washers 39. Also surrounding the plunger rod 33 forwardly of the plates 38 is a holding or locking plate 40, one end of which is elongated and extends through the lower open portion of the frame and is turned forwardly and downwardly forming a finger portion 4| extending substantially parallel with the lever 21. Surrounding the rod 33 betweenthefeeding plates 38 and holding plate 40 is a coil spring 42. Also surrounding the rod 33 between the holding plate and the back of the cap 3 is a compression spring 43 of slightly greater strength than the spring 42 so that normally the holding plate 40 will be held in gripping relation on the plunger rod 33. A pin 44 extends transversally through the forward portion of the frame near the holding plate and under the rod 33 to provide a fulcrum or pivotal point for the holding plate 40.

The cartridge 1 is preferably formed of cardboard material or the like and has a forward end 45 provided with a weakened or cut-out portion 49 for engagement with the inner end of the spout 9. The end 45 is also of cardboard or other similar material sufficiently pliable so that it will fit tight around the spout and of the portion of the head adjacent the spout on the magazine.

The rear end of the cartridge is provided with 3 an end 41 having outwardly extended flanges 48 which fits in the end of the cartridge for receiving the disk 34 on the end of the rod 33 thus forming a piston for the cartridge.

Operation of the device constructed and assembled as described is as follows:

The plunger rod 33 is withdrawn from the magazine through the frame by backward pressure on .the finger portion 4| of the holding plate 40, the plate being fulcrumed on the pin 44 to move the upper end forwardly against tension of the spring 43, thus releasing the plate 40 from gripping engagement with the rod. Backward pull on the handle 31 of the rod 33 will move the plunger rod with its disk back to the cap 3. The cartridge 1 may then be inserted in the magazine by placing the forward end in the head 4, the punched out portion 46 of the the inner end of the spout 9. There is sufficient space between the flanges 5 and 6 to allow the rear end of the cartridge to pass the flange 5 of the cap when the cartridge is moved forwardly in the head, and when this is done the cartridge will lie in the magazine. I I

The upper end of the lever 21 is provided with an upstanding lug 49 adapted to engage against the rear face of the plates 38. Operation of the lever 21 will cause the lug 49 to engage the plates 38 and cause them to grip the rod 33 and move it forwardly. Tension of the spring 42 will overcome tension of the spring 43 releasing the plate 40 so that the plunger will be fed forwardly in the magazine; the plates 38 gripping the rod when the lug 49 through lever 21 exerts pressure on the lower end thereof. When the lever 21 is released thespring 43 again overcomes the tension of the spring 42 and the holding plate 40 will grip the rod to hold the rod in its forwardly extended position. As the plunger movesforwardly, the disk 34 will engage the end 41 of the cartridge and continued forward movement of the rod through operation of the lever 21 will cause the piston-like structure to move forwardly in the cartridge to cause the plastic material 8 to be dispensedthrough the spout 9. Pressure on the end 45 receiving plastic material will cause the flexible end 45 of the forward end of the cartridge to seal around head. In other words, the construction will form a partial vacuum for the prevention of loss of material around the head.

I also provide a hairpin spring 50, engaging over the pivot pin 26 and having its ends engaging in the hand grip 20 and lever 21 for providing tension'on the lever to hold it normally in forward position.

It will be obvious from the foregoing that I have provided an improved caulking gun and particularly magazine having a head which will prevent loss of the material dispensed from the gun around such head.

What I claim and desire to secure by Letters Patent is:

In combination with a cartridge containing caulking material, said cartridge having an elongated tubular body, a flanged end member closing one end'of the tubular body with the flange engaging the inner surface of the tubular body and adapted to he slid therein substantially the entire length thereof as a piston for ejecting the caulking material from the tubular body, an end memher or formable material fixed at the other end of the tubular body for closing same, said end member having an opening substantially centrally thereof, a dispensing apparatus having a semi-cylindrical member forming a trough which is longer than the tubular body of the cartridge and of suitable diameter to receive said tubular body therein, head members having inturned peripheral flanges rigidl fixed to the respective ends of the semi-cylindrical member, a rod ex tending through one of the heads, a disk fixed on the end of the rod for engaging the flanged end member of the cartridge, means for moving the rod for forcing the flanged end member toward the other end of the cartridge, a tubular spout axially of the other head and having a portion adapted to extend into and substantially engage the edges of the opening in the end member of the cartridge, a plurality of oifset parallel plane surfaces connected by outwardly sloping portions and forming annuli on the inner face of said head concentric with the spout whereby pressure applied by the rod on the flanged end member and contents of the cartridge eflects engagement of the formable end member with said annuli and deforms said-end member to conform to the shape of the annuli and effect a sea1 with the head and further movement of the rod forces caulking material from the spout.

WILBUR P. PETERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,105,039 Hulme Jan. 11, 1938 2,106,577 Sherbondy Jan. 25, 1938 -2;139,1-43 Wiswell Dec. 6, 1938 2,367,346 Good Jan. 16, 1945 

